JPS59185674A - Sheet supplying device - Google Patents

Abstract

PURPOSE:To unnecessitate an operation for separating a separating roller from the surface of a sheet even when supplying the sheet or in similar occasions, by a method wherein a rotating lever supporting the shaft of a separating roller is provided with a driven gear, a rotating force of a platen is transmitted to the driven gear through a speed-reducing mechanism by a rotating force transmitting mechanism, and the force is transmitted also to the separating roller. CONSTITUTION:A contact resistance is previously applied to the driven gear 44 provided for the rotating lever 32a, and a rotating force of the speed-reducing mechanism is given to the gear 44 to rotate the rotating levers 32a, 32b, whereby the separating roller 34 is selectively pressed against the surface of the sheet 57. By this, the rotating force of the platen 34 can be transmitted to the roller 34 irrespectively of the direction in which the platen 13 is rotated. In addition, since the roller 34 is pressed against the surface of the sheet 57 only when the platen 13 is rotated reversely, drawing-out and insertion of a sheet holding cassette 55 at the time of supplying the sheet or in similar occasions can be easily performed without requiring any operation for separating the roller 34 away from the surface of the sheet.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is detachably attached to an office machine such as a printer or typewriter, and is connected to the office machine by using the rotational force of a platen provided on the office machine side. The present invention relates to a paper sheet feeding device for feeding paper sheets.

[Technical background of the invention]

2. Description of the Related Art Printers, tie writers, and the like are configured such that a pinch roller is placed in circumferential contact with a platen, and by rotating the platen in the normal direction, a sheet of paper inserted between the platen and the pinch roller is sent in a predetermined direction.

This type of office machine is generally equipped with a paper feeder having a paper holding section, and the paper sheets stacked and held in the paper holding section are taken out one by one by a separating roller and placed between a platen and a pinch roller. However, while a sheet is being fed in a predetermined direction between the platen and the pinch roller, the next sheet is not fed from the sheet feeding device. It is necessary to

On the other hand, it is desired that the sheet feeding device is not provided with a drive source and that the sheet feeding device is made to use the rotational force of the platen on the office machine side to perform sheet feeding.

Therefore, when transmitting the zero rotational force of the platen to the outer roller on the sheet feeding device side, it is necessary to prevent the sheet feeding operation by the platen and the sheet feeding operation by the separation roller from being performed at the same time. One idea is to transmit the rotational force to the separation roller only when the platen rotates in the reverse direction, and to feed the paper sheets between the platen and the pinch roller while rotating the platen in the reverse direction.

FIGS. 1 to 5 show examples of conventional devices developed based on this idea. In the figure, reference numeral 1 denotes a passive rotating body provided on the side of the sheet feeding device, which is driven by a common drive source with the platen in conjunction with the platen. Reference numeral 2 denotes a cam plate mounted on a common shaft 3 with the passive rotating body 1, and the rotational force of the cam plate 2 is transmitted to the separating roller on the sheet feeding device side. An engaging piece 4 is rotatably supported on the passive rotating body I.

The cam plate 2 has an engagement recess 5 in a part thereof, and a swinging piece 6 is pivotally supported in the vicinity of the engagement recess 5. The swinging piece 6 has one end brought into contact with the cam surface of the cam plate 2 by a spring 7, and the other end covers the engagement recess 5.

Further, the engagement piece 4 has an engagement pin 8 at the rotating end, and a spring 9
This brings the retaining pin 8 into contact with the cam surface or the outer surface of the swinging piece 6.

Therefore, in order to rotate the separation roller on the sheet feeding device side by the drive source for driving the platen on the office machine side, the passive rotating body 1 is first rotated in the direction of the arrow as shown in FIG. The rotational direction of the drive source at this time is the direction in which the platen is rotated in the opposite direction.

As the passive rotating body 1 rotates, the engagement pin 8 moves from the cam surface of the cam plate 2 to the outer surface of the swinging piece 6, and the position of the retaining pin 8 crosses the fulcrum position of the swinging piece 6. The pressing force of the engagement pin 8 by the spring 9 overcomes the spring 7, causing the swinging piece 6 to swing as shown in FIG. 2, so that the other end of the swinging piece 6 comes into contact with the cam surface.

When the passive rotating body 1 further rotates in the same direction and the retaining pin 8 moves from the swinging piece 6 to the cam surface as shown in FIG.
is returned to its original position by the spring 7.

When the rotational direction of the drive source is changed and the passive rotating body 1 is slightly rotated in the opposite direction (the direction in which the platen is rotated forward), the retaining pin 8 is moved into the engagement recess 5 of the cam plate 2 as shown in FIG.
It will fall into.

Next, when the rotational direction of the drive source is switched again and the passive rotating body 1 is returned to the initial rotational direction, the engaging pin 8 is engaged with the four engaging parts 5 of the cam plate 2, as shown in FIG. The rotating body 1 and the cam plate 2 rotate together, the rotational force of the cam plate 20 is transmitted to the separation roller on the paper sheet feeding device side, and the rotation of the separation roller feeds the paper sheets to the office machine side. Become.

[Problems with background technology]

As described above, in conventional devices that feed paper sheets using a drive source for driving the platen on the office machine side, the separation roller is rotated only when the platen is rotated in the reverse direction. Plate 2, engaging piece 4, swinging piece 6
In addition, the rotational direction of the drive source must be changed many times, and the control system on the office machine side for controlling the drive source is also complicated.

Furthermore, it is necessary to replenish the paper sheet feeder with the paper sheet in a state where the t1t roller is separated from the surface of the paper sheet, but there is also the trouble of having to carry out such single harvesting as a separate operation.

[Purpose of the invention]

The present invention (first invention, second invention) was made based on such circumstances, and its purpose is to transmit the rotational force of the platen on the office machine side to the separation roller with an extremely simple configuration. To provide a paper sheet feeding device which can feed paper sheets and does not require troublesome operations when replenishing paper sheets.

[Summary of the invention]

First, the first invention is a paper sheet feeding device that feeds paper sheets to an office machine using the rotational force of a platen on the office machine. A passive gear is provided for the rotating part, and a contact member provides an appropriate contact resistance to this gear, and a deceleration mechanism is provided in the feeder body, and the rotational force of the platen is transferred to the rotational force by the rotational force transmission mechanism. to the passive gear via
The rotational force of the platen is also transmitted to the separation roller, and when the platen rotates in the reverse direction, the rotational force is transmitted to the passive gear and the rotational gear is rotated to press the separation roller against the surface of the paper sheet, The present invention is characterized in that nine sheets are fed by the rotation of the separation roller.

Therefore, with an extremely simple configuration, the rotational force of the flatten can be transmitted to the separating roller to feed paper sheets, and the separating roller is pressed against the surface of the sheet only when the flatten is rotating in the opposite direction. Therefore, there is no need to remove the separation roller from the surface of the paper sheets when replenishing paper sheets or the like.

Further, in addition to the first invention, the second invention provides a click mechanism that selectively stably holds the rotary lever in two positions, and presses the separation roller against the surface of the paper sheet, or presses the separation roller against the surface of the paper sheet. The separating operation is made to be performed in an active manner, thereby making it possible to more reliably operate the rotary lever.

[Embodiments of the invention]

6 to 9 show an embodiment of the present invention,
FIG. 6 shows a state in which a paper sheet feeding device 12 is attached to the top surface of an office machine 11 such as a printer or a tights writer. The paper supply device 12 is detachable from the office machine 11. Further, FIG. 7 is a longitudinal cross-sectional view showing the sheet feeding device 12 in relation to the office machine 11 side, with one (front side) side plate omitted.

As shown in FIG. 7, the office machine 11 includes a platen 13, a pinch roller 14 surrounding the platen, a bevel guide 5 disposed along the outer periphery of the flat plate 13, a motor 16 for driving the platen, etc. We are prepared.

On the other hand, the paper sheet supply device 12 is provided with a detachable mounting base 18 at the bottom of the supply @ storage body 17.

A grating gear 20 and a platen roller 21 are attached to the shaft (platen shaft) 19 of the platen 13, and the motor 16 side 22 is configured to drive the platen pulley 2 via a belt 23. There is.

The mounting base 18 of the sheet feeding device 12 has legs 24 provided on the front left and right sides (only one side is shown) connected to the platen shaft 19.
It is mounted on the office machine 11 with one leg 24
A pair of upper and lower transmission gears 25 and 26 are provided, and the lower transmission gear 26 meshes with the platen gear 20.

Further, a passive gear 27 and a timing pulley 28 are coaxially provided at the lower part of one side plate of the supply device main body 17, and the passive gear 27 is meshed with the transmission gear 25. Furthermore, timing pulleys 29 and 30 are provided at the front and upper portions of one of the side plates, respectively.

In addition, the left and right side plates of the supply device main body 17 (only one side is shown)
A rotating shaft 31 is supported at both ends. Rotating levers 32a and 32 are provided at both ends of this rotating shaft 3I, respectively.
b is fixed as shown in FIG. 8, and a roller shaft 33 is rotatably supported at both ends of both levers 32a and 32b.

A pair of left and right separation rollers 34 and a timing pulley 35 are integrally attached to the roller shaft 33, respectively. And these timing pulleys 2B
, 29, 30.35, a timing belt 36 is wrapped around them, and together with the transmission gears 25.26, a rotation transmission mechanism 37 is constituted. A balance pulley 38 is provided on the one rotation lever 32a at a position opposite to the timing pulley 35 with respect to its rotation center, and this balance pulley 38 is brought into contact with the back surface of the timing belt 36. . Further, an engaging protrusion 39 is provided on a part of one of the rotary levers 32a, and a leaf spring 41 that constitutes a click mechanism 40 together with the engaging protrusion 39 is provided on the supply device main body 17. This plate spring 41 has two four parts 41a that engage the engagement protrusion 39.

41b, and is configured to allow the rotating lever 32a to rotate articulately and to selectively hold it stably in either of two positions. Also, 42 in Figure 7
This is a tension girder pressed against the back surface of the belt 36 by the elasticity of a spring 43.

A passive gear 4 is provided at the rotating end of the one rotating lever 32a.
4 is provided, and a contact member 45 is inserted between the gear 44 and the lever 32a to provide appropriate contact resistance against rotation of the gear 44. Further, a small diameter transmission gear 46 is provided on the timing pulley 30 so as to rotate therewith. Further, the supply device main body 17 is provided with two large and small gears 47 and 411 that rotate together, the large gear 47 serving as a transmission gear 46 and the small gear 48 serving as the passive gear 44.
The transmission gear 46 and the deceleration mechanism 49 are meshed with each other.
I am trying to configure it.

The timing pulley 29 is rotatably supported by a shaft 51 supported between left and right side plates.

A sheet receiving row 252 is integrally attached to this shaft 51, and a one-way clutch 5 is attached to one end of the same shaft 51.
3 is provided. When the timing pulley 29 rotates counterclockwise in FIG.
2 and not when the timing pulley 29 rotates clockwise.

In fact, cassette loading grooves 54 are provided on the inner surfaces of the left and right side plates (only one side is shown) of the feeding device main body 17, and both loading grooves 54 have a sheet holding cassette 5 as a sheet holding section.
5 is loaded from above at a slightly backward angle with respect to the main body 17 of the supply device.

The sheet holding cassette 55 has a sheet placing plate 56 therein, and the sheet placing plate 56 is rotatably supported at its upper edge inside the cassette 55. Paper sheets 57 of a predetermined size are stacked and held on this sheet placement plate 56. Further, the lower end of the paper sheet placement plate 56 is urged outward by a spring 58 from the lower surface side, but the maximum rotation amount in the direction of the urging force is that of the uppermost position of the stacked and held paper sheets 57. It is configured to be restricted by bringing the surface into contact with the stopper 59.

Both rotating levers 32a, 32b and paper holding cassette 5
5 is such a relationship that the separation roller 34 can be selectively brought into contact with the lower surface of the sheet 570 at the uppermost position by the rotation of the rotation levers 32h and 32b.

Further, in a position in front of the cassette loading groove 54, a stocker 63 is provided for receiving processed paper sheets 57 sent out from the office machine 11 side. The paper sheet receiving four rollers 52 are located at a lower position of this stocker 63, and a receiving pinch roller 64 is in contact with the circumference thereof.

Note that 65 and 66 in FIG. 7 are a supply vane f guide and a receiving paper guide provided at the lower part of the supply device main body 17. For supply, the paper sheet 57 taken out by the separating roller 34 is transferred to the office machine 11ill.
The receiving peno R guide 66 is a guide between the platen 13 and the pinch roller 14 of the office machine 1.
The processed paper sheet 57 sent out from the first side is guided downward between the paper sheet receiving roller 52 and the receiving pinch roller 64. Further, a single paper sheet insertion guide 67 is provided at the lower end of the back plate of the stocker 63, through which the supply waveform communicates with the ID 65 from inside the stocker 63.

Next, the operation will be explained.

First, sheets 57 of a certain size are stacked on the sheet placement plate 56 of the sheet holding cassette 55, and the cassette 55 is inserted into the cassette loading groove 54 to create the state shown in FIG.

Therefore, when a predetermined operation for feeding the paper sheet 57 is performed, the motor 16 on the office machine 11 side is activated to rotate the platen 13 in the reverse direction (counterclockwise rotation in FIG. 7). The rotational force of the platen gear 20 is transferred to the transmission gear 26.
．． 25 and is transmitted to the driven gear 27. Then, the timing pulleys 29, 30, 35 are further rotated clockwise in the figure via the timing belt 36, and the rotational force of the timing pulley 30 is transmitted to the small gear 48 via the gears 46, 47.

However, since the contact member 45 provides contact resistance to the passive gear 44 meshing with the pinion 48, the pinion 48
When the rotation levers 32a and 32b rotate counterclockwise,
receives the rotational force, and the right direction 32b in the figure is the stop horn #3.
It rotates from the 8a, 38b side to the stoppers 39a, 39b. Thereupon, the separation roller 34 comes into pressure contact with the surface of the uppermost paper sheet 57 as shown in FIG. It will be supplied between.

At this time, the platen 13 is rotating in the opposite direction, so the paper sheet 57 fed upward is not drawn into between the platen 13 and the pinch roller 14, and the lower end of the paper sheet 52 is held between the pinch roller 13 and the pinch roller 14. It is held at a fixed position in contact with the roller 14.

Note that after the separation roller 34 comes into pressure contact with the surface of the sheet 57, the passive gear 46 rotates against the contact resistance of the contact member 45.

Next, when the paper sheet 57 is processed, for example, an operation to start printing is performed, the motor 16 is driven in the direction of forward rotation of the platen 13, and the rotational force of the platen 130 is transferred to the transmission gear 26, the passive gear 27, and the like. Timing pulleys 95, 30 via timing belt 36.

29.

The paper sheet 57, which had been waiting with its lower end in contact with the platen 13 and the pinch roller 14, is drawn between the platen 13 and the pinch roller 14 at the same time as the platen 13 starts rotating, and as the platen 130 rotates. The paper is fed along the paper/e guide 15 so as to wrap around the outer periphery of the platen 13.

In addition, the rotational force of the timing pulley 30 is
The signal is transmitted to the small gear 48 via.

Then, the rotating lever 32 a r J 2 b B immediately returns to its original position by the rotational force of the small gear 48 , and the separation roller 3
4 from the surface of the paper sheet 57. Therefore, even though the rotational direction of the separation roller 34 is opposite to the sheet feeding direction, the next sheet will not be fed during the forward rotation of the platen 13.

On the other hand, the paper sheets 57 processed in the office machine 11 are guided through the receiving paper guide 66 between the paper sheet receiving roller 52 and the receiving pinch roller 64, but at this time,
The rotational force from the platen I3 side is transmitted to the sheet receiving roller 52 via the one-way clutch 53, and since the direction of rotation is to send the sheet 57 upward, it is transmitted through the receiving vapor guide 66. The paper sheet 57 sent out from the office machine 11 side is drawn between the paper sheet receiving roller 52 and the receiving pinch roller 64, and is sent upward and stored in the stocker 63.

Therefore, according to the sheet feeding device configured in this way, contact resistance is applied to the passive gear 44 provided on the rotation lever 32a, and the rotational force of the reduction mechanism is applied to the passive gear 44 to rotate it. The levers 32g and 32b are rotated to selectively press the separating roller 34 against the surface of the sheet 57, so that when the platen 13 rotates in any direction, the rotational force is transferred to the dividing roller. 34. By adopting such a configuration, a complicated mechanism as shown in FIGS. 1 to 5 becomes unnecessary, and a simple configuration can be achieved. In addition, since the separation roller 34 does not come into pressure contact with the surface of the paper sheet 57 unless the platen 13 is rotated in the reverse direction, the separation roller 34 must be pulled out and inserted separately when the paper sheet holding cassette 55 is pulled out and inserted when replenishing paper sheets, etc. The click mechanism 40 also allows the rotation levers 32a, 32
The rotational movement (b) becomes effective (a), and the separation roller can be moved toward and away from the paper sheet in a flexible manner.

Note that the present invention is not limited to the above embodiments.

For example, in the embodiment described above, a mechanism using gears and belt transmission is employed as the rotation transmission mechanism 37, but the rotation transmission mechanism is not limited to this, and may be configured using only gears, for example.

〔Effect of the invention〕

As described in detail above, the first invention is a paper sheet feeding device that uses the rotational force of a platen on the office machine side to feed paper sheets to the office machine side. It is supported by a rotary lever, and the rotary lever is equipped with a passive gear to provide a suitable contact resistance to the gear by a contact member.The main body of the feeding device is equipped with a deceleration mechanism, and the platen is rotated by a rotational force transmission mechanism. The power is transmitted to the passive gear via the reduction mechanism, and the rotational force of the platen is also transmitted to the separation roller, so that when the platen rotates in reverse, the rotational force is transmitted to the passive gear to cause the rotating gear to rotate. The separation roller is rotated to press the separation roller against the surface of the paper sheet, and the rotation of the separation roller feeds the paper sheet.

Therefore, with an extremely simple configuration, the rotational force of the platen can be transmitted to the separation roller to feed the paper sheets, and the separation roller is in pressure contact with the surface of the paper sheets only when the platen is rotating in the opposite direction. Even when replenishing paper sheets, there is no need to separate the separation roller from the surface of the paper sheets.

In addition to the first invention, the second invention provides a click mechanism that selectively and stably holds the rotary lever in two positions, presses the stagnation roller against the surface of the paper sheet, and presses the stagnation roller against the surface of the paper sheet. This is designed to allow the movement of separating the levers to be performed more articulately, and thereby the operation of the rotary lever can be made more reliable.

[Brief explanation of drawings]

Figures 1 to 5 are plan views showing a conventional example, Figures 6 to 9 show an embodiment of the present invention (first invention, second invention), and Figure 6 is a plan view showing a conventional example. A perspective view showing a state in which the sheet feeding device is attached to the machine, FIG. 7 is a vertical sectional view showing the sheet feeding device in relation to the office machine, and FIG. 8 shows the relationship between the rotating iZ- and the crank. FIG. 9 is a schematic perspective view and a schematic cross-sectional view showing the state of sheet feeding operation. 1 No.. Office machine, 12'.. Paper sheet feeding device, 13.
...Platen, 14...Pinch roller, 32a, 32
b...Rotating lever, 34...Separation roller, 37...
- Rotation transmission mechanism, 39... Engaging protrusion, 40... Click mechanism, 4... Leaf spring, 44... Passive gear, 45
... Contact member, 49 ... Reduction mechanism, 55 ... Paper sheet holding cassette (paper sheet holding section), 57 ... Paper sheet. Applicant's Representative Patent Attorney Takeshi Suzue Syllable 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) Attachment/detachment to an office machine configured so that paper sheets inserted between the platen and the pinch roller are fed in a predetermined direction by placing a pinch roller circumferentially around the platen and rotating the platen in the normal direction. A feeding device main body that is freely attached, a rotating lever that is rotatably provided on the feeding device main body, and a sheet holding portion that is pivotally supported by this rotating lever and when the rotating lever rotates in one direction. Out of the plurality of sheets held in a stack, the sheet is pressed against the surface of the sheet at the endmost position and rotated in a predetermined direction, thereby feeding the sheet at the endmost position between the grating and the pinch roller. a separation roller, a rotation transmission mechanism that transmits the rotational force of the separation roller to the platen and rotates the separation roller in the sheet feeding direction when the platen rotates in reverse; a passive gear pivotally supported by the rotation lever; a contact member that provides an appropriate contact resistance to the feeder; and a contact member that is pivotally supported by the feeder main body, meshes with the passive gear, and transmits the rotational force of the platen through the rotation transmission mechanism, and when the platen rotates in reverse, the separation roller A paper sheet feeding device characterized by comprising: a deceleration mechanism that rotates the rotary lever in a direction to bring it into contact with the surface of the paper sheet. (2) It can be attached to and detached from an office machine that is configured so that a pinch roller is circumferentially attached to the platen and the platen is rotated in the normal direction so that paper sheets inserted between the platen and the pinch roller are fed in a predetermined direction. A feeder body that is freely attached, a rotary lever that is rotatably provided on the feeder body, and a sheet holder that is pivotally supported by this rotary lever and when the rotary lever rotates in one direction. Among the plurality of sheets held in a stack, the sheet is pressed against the surface of the sheet at the endmost position and rotated in a predetermined direction, thereby moving the sheet at the endmost position between the platen and the pinch roller. a separation roller to be supplied; a rotation transmission mechanism that transmits the rotational force of the separation roller to rotate the separation roller in the paper sheet feeding direction when the platen rotates in reverse; and a passive gear pivotally supported by the rotation lever;
A braking mechanism that applies an appropriate braking force to the passive gear, and a braking mechanism that is pivotally supported by the supply device main body and meshes with the passive gear, transmits the rotational force of the platen through the rotation transmission mechanism, and rotates the platen in reverse. a deceleration mechanism that rotates the rotary lever in a direction in which the separation roller is brought into contact with the surface of the sheet, and a speed reduction mechanism that moves the rotary lever to a position where the separation roller is brought into pressure contact with the surface of the sheet or to a position where it is separated from the surface of the sheet. A paper sheet feeding device characterized by comprising a click mechanism that selectively holds the sheet stably by a spring force.